<center><b>Server variables</b></center>
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GATEWAY_INTERFACE = <?php echo $_SERVER['GATEWAY_INTERFACE']; ?> <br>
SERVER_ADDR = <?php echo $_SERVER['SERVER_ADDR']; ?> <br>
SERVER_NAME = <?php echo $_SERVER['SERVER_NAME']; ?> <br>
SERVER_SOFTWARE = <?php echo $_SERVER['SERVER_SOFTWARE']; ?> <br>
SERVER_PROTOCOL = <?php echo $_SERVER['SERVER_PROTOCOL']; ?> <br>
REQUEST_METHOD = <?php echo $_SERVER['REQUEST_METHOD']; ?> <br>
REQUEST_TIME = <?php echo $_SERVER['REQUEST_TIME']; ?> <br>
QUERY_STRING = <?php echo $_SERVER['QUERY_STRING']; ?> <br>
DOCUMENT_ROOT = <?php echo $_SERVER['DOCUMENT_ROOT']; ?> <br>
HTTP_ACCEPT = <?php echo $_SERVER['HTTP_ACCEPT']; ?> <br>
HTTP_ACCEPT_CHARSET = <?php echo $_SERVER['HTTP_ACCEPT_CHARSET']; ?> <br>
HTTP_ACCEPT_ENCODING = <?php echo $_SERVER['HTTP_ACCEPT_ENCODING']; ?> <br>
HTTP_ACCEPT_LANGUAGE = <?php echo $_SERVER['HTTP_ACCEPT_LANGUAGE']; ?> <br>
HTTP_CONNECTION = <?php echo $_SERVER['HTTP_CONNECTION']; ?> <br>
HTTP_HOST = <?php echo $_SERVER['HTTP_HOST']; ?> <br>
HTTP_REFERER = <?php echo $_SERVER['HTTP_REFERER']; ?> <br>
HTTP_USER_AGENT = <?php echo $_SERVER['HTTP_USER_AGENT']; ?> <br>
HTTPS = <?php echo $_SERVER['HTTPS']; ?> <br>
REMOTE_ADDR = <?php echo $_SERVER['REMOTE_ADDR']; ?> <br>
REMOTE_HOST = <?php echo $_SERVER['REMOTE_HOST']; ?> <br>
REMOTE_HOST2 = <?php echo gethostbyaddr($_SERVER['REMOTE_ADDR']); ?><br>
REMOTE_PORT = <?php echo $_SERVER['REMOTE_PORT']; ?> <br>
SCRIPT_FILENAME = <?php echo $_SERVER['SCRIPT_FILENAME']; ?> <br>
SERVER_ADMIN = <?php echo $_SERVER['SERVER_ADMIN']; ?> <br>
SERVER_PORT = <?php echo $_SERVER['SERVER_PORT']; ?> <br> 
SERVER_SIGNATURE = <?php echo $_SERVER['SERVER_SIGNATURE']; ?> <br>
PATH_TRANSLATED = <?php echo $_SERVER['PATH_TRANSLATED']; ?> <br>
SCRIPT_NAME = <?php echo $_SERVER['SCRIPT_NAME']; ?> <br>
REQUEST_URI = <?php echo $_SERVER['REQUEST_URI']; ?> <br>
PHP_AUTH_DIGEST = <?php echo $_SERVER['PHP_AUTH_DIGEST']; ?> <br>
PHP_AUTH_USER = <?php echo $_SERVER['PHP_AUTH_USER']; ?> <br> 
PHP_AUTH_PW = <?php echo $_SERVER['PHP_AUTH_PW']; ?> <br>
AUTH_TYPE = <?php echo $_SERVER['AUTH_TYPE']; ?> <br>